Question

I have Customer class that make connection to db and save data to mysql. I use tomcat7 and mysql. I want to test this class. I have this method:

public CustomerData findById(int customerId) throws SQLException {
    Connection conn = null;
    PreparedStatement stmt = null;
    CustomerData customer = null;

    try {
        String sql = "SELECT id, status, username, email, age, country, city, is_hidden FROM "
                + TABLE + " WHERE  id = ?";

        conn = DBManager.getConnection();
        stmt = conn.prepareStatement(sql);

        stmt.setInt(1, customerId);

        ResultSet rs = stmt.executeQuery();

        if (rs.next()) {
            customer = new CustomerData(rs.getInt(1), rs.getInt(2),
                    rs.getString(3), null, rs.getString(4), rs.getInt(5),
                    String.valueOf(rs.getInt(6)), String.valueOf(rs
                            .getInt(7)), 0, rs.getInt(8));
        }

        return customer;
    } finally {
        closeConnection(conn, stmt);
    }
}

How can I test it?

Answer 1

You can test it just like you want to, i would recommend you create a seperate database though, seperating production and test data.

You should check out the article from dallaway, which is absolutely brilliant.